ET MALWARE MICROPSIA Sending JPG Screenshot to CnC with .his Extension

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MICROPSIA Sending JPG Screenshot to CnC with .his Extension";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent;
    content:"compatible|3b 20|Googlebot|2f|";
    http.request_body;
    content:"name=|22|kerna|22 3b 20|filename"; fast_pattern;
    content:".his|22 0d 0a|"; within:20;
    content:"|0d 0a 0d 0a ff d8 ff|"; distance:0;
    content:"JFIF"; within:15;
    http.accept_enc;
    content:"UTF8"; depth:4; endswith;
    http.content_type;
    content:"multipart|2f|form-data|3b 20|boundary|3d 2d 2d 2d 2d 2d 2d 2d|Embt-Boundary";
    reference:md5,6eff53e85a9ce9f1d99c812270093581;
    reference:url,twitter.com/ClearskySec/status/1054722167433297920;
    classtype:command-and-control;
    sid:2026550; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_24, deployment Perimeter, malware_family MICROPSIA, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2020_11_19;
)